how did you secure your visor into your mark v helm?
I made the helmet. Then taped off the entire visor and put it into the position that I wanted it to be. I filled the entire gap with bondo and let it dry. I took the visor out and sanded the excess bondo down, but was careful not to sand the shape of the visor. Once it was perfectly smooth I pulled the tape off of the visor, and glued it into place with super glue and hot glue. Hope this helps.
with regard to the Pepakura designer, I dunno, mate - I've nt played about with it, only the viewer.
And I'll finish up on the Jetpack first, 'cause there's a lot of people waiting for that. Then if no-one else has started JFO - I'll get on it, and get back to you about reference pics. How does that sound?